mix 8. 53. 
265 
^ 693. H. orbiculata Ferussac. 
T, imperforata, subsemiglobosa, solida, striata, virenti-fusca; 
spira convexa, obtusa; anfr. 57a planiiisculi, ultimus obsolete 
angulatus, ad peripheriam zonis 2 angustis, nigricanti-rufis cir- 
cumdatus, basi planiusculus; apertura perobliqua, lunato-elliptica; 
perist. incrassatum, subreflexum, fusco -violaceum, marginibus 
callo junctis, basali late transverse dentato. — Diam. maj. 34, 
min. 29, ait. 16 mill. (Coli. Nr. 412.) 
Helix orbiculata (Helicogena) bYr. pr. 86. Hist. t. 47. f. 4. 
— — Lam, ed. Dh. 2 16. p. 131. 
• — — ChetruL ed. II. Helix N. 424. t. 70. f. 9. 10. 
Dentellaria orbiculata Beck ind. p. 35. 
fi. Minor, absque cingulis: diam. 24, ait. 18 mill. (ex ic.) 
Helix orbiculata var. Fer, hist. t. 47. f. 3. 
Dentellaria decipiens Beck ind. p. 33. 
Habitat in Guyana et Cayenne. 
694. H. phloiodcs Ffr. 
T. imperforata, depressa, solida, sub epidermide corticina 
(strigis saturatioribus variegata) nitide nigricanti-rufa ; spira sub- 
planulala; sutura profunda; anfr. 4 J /2 convexi; columella subrecta, 
perobliqua , subexcavata ; apertura late lunaris, intus livida, ni- 
tida; perist. incrassatum, reflexura, fuscum. — R. a. = 3 : 5. — 
Diam. maj. 29, min. 25, ait. mill. (Mus. Cuming.) 
Helix phloiodes Pfr. in Proc. Zool. Soc. 1 842. p. 151. 
Habitat in insula Zebu Philippinarum (Cuming). 
695. H, discolor Ferussac. 
T. imperforata, depresso -globosa, solida, striata, obsolete 
granulata, pallide rufa; spira semiglobosa; anfr. 4, summi planius- 
culi, ultimus inflatus, angulatus, supra angulum fascia pallida 
ornatus, subtus saturatior, antico gibbus, subito deflexus; aper- 
tura irregulariter ovalis; perist. late incrassatum, subreflexum, 
marginibus callo junctis, supero dilatato, basali dente oblongo, 
calloso munito. — Diam. maj. 34, min. 28, ait- 20 mill. (Coli. 
Xr. 413.) 
Helix discolor (Helicogena) Fer, pr. 79. Hist. t. 46. f. 3 — 6. 
— — La7n, 33. p. 73. ed. DIi. p. 43. 
— — Wood suppi, t. 7. f. 46. 
— — Chemn, ed. II. Helix N. 47. t. 9. f. II. 12. 
Dentellaria discolor Beck ind. p. 33. 
Habitat in Cayenne! Trinidad, Martinique (Fer.). 
Obs. Forma saepe irregularis, tosta a lalcre quasi compressa, diametro 
longiore aucta. 
